spring boot kafka异步发送 springboot kafka stream

源基础上导入 pom 依赖

<dependency>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka-streams</artifactId>
            <version>2.6.0</version>
        </dependency>

创建流对象

package com.fang.stream;

import org.apache.kafka.clients.admin.NewTopic;
import org.apache.kafka.streams.kstream.KStream;
import org.apache.kafka.streams.KeyValue;
import org.apache.kafka.streams.StreamsBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

/**
 * @Author Mr. Sun.
 * @Date 2020-11-10 8:48
 */
@Component
public class KafkaStream {
    @Bean
    public KStream<String, String> kStream(StreamsBuilder streamsBuilder){
        KStream<String, String> stream = streamsBuilder.stream("Stream");
        // 有兴趣可以写个 wordCount
        stream.map((key,value) -> {
            value+="--test--";
            return new KeyValue<>(key,value);
        }).to("AnotherTopic"); 
        return stream;
    }
}

监听出口

package com.fang.stream;

import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Component;

/**
 * @Author Mr. Sun.
 * @Date 2020-11-10 9:22
 */
@Component
public class KafkaStreamListener {

    @KafkaListener(topics = "AnotherTopic")
    public void onMessage1(String message) {
        // 处理
        System.out.println("Stream处理之后的"+message);
    }

    @KafkaListener(topics = "Stream")
    public void onMessage2(String message) {
        // 处理
        System.out.println("Stream处理之前的"+message);
    }
}

测试

@RequestMapping("/streams")
    public String sendMessageStreams(){
        kafkaTemplate.send("Stream","key1","你好1");
        return "success";
    }